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macros.s
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macros.s
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processor 6502
mac varbase
NEXT_VAR set {1}
endm
mac var
{1} = NEXT_VAR
NEXT_VAR set NEXT_VAR + 1
endm
mac varrange
{1} = NEXT_VAR
NEXT_VAR set NEXT_VAR + {2}
endm
mac checkvarbase
if NEXT_VAR > {1}
err
endif
endm
mac definescript
NEXT_EP set {1}*$100
endm
mac defineep
EP_{1} = NEXT_EP
NEXT_EP set NEXT_EP + 1
endm
; Text jump. Game texts need to be located between $0000-$7fff to use
mac textjump
dc.b >{1} | $80
dc.b <{1}
endm
; BIT instruction for skipping the next 1- or 2-byte instruction
mac skip1
dc.b $24
endm
mac skip2
dc.b $2c
endm
; Encode 4 instruction lengths into one byte
mac instrlen
dc.b {1} | ({2} * 4) | ({3} * 16) | ({4} * 64)
endm
; Screen redraw macros
mac drawbottomedge
subroutine dbe
ldy $1000,x
lda blkColors,y
bne .1
lda (dsBottomPtrLo),y
sta colors+{1},x
bcc .3
.1: sta colors+{1},x
.2: lda (dsBottomPtrLo),y
.3: sta screen+{1},x
subroutine dbeend
endm
mac drawbottom
subroutine db
ldy $1000,x
lda blkColors,y
bmi .1
bne .2
lda blkBL,y
sta colors+{1},x
sta screen+{1},x
lda blkBR,y
sta colors+{1}+1,x
bcc .3
.1: sta colors+{1},x
sta colors+{1}+1,x
.2: lda blkBL,y
sta screen+{1},x
lda blkBR,y
.3: sta screen+{1}+1,x
subroutine dbend
endm
mac drawtopedge
subroutine dte
ldy $1000,x
lda blkColors,y
bne .1
lda (dsTopPtrLo),y
sta colors+{1},x
bcc .3
.1: sta colors+{1},x
.2: lda (dsTopPtrLo),y
.3: sta screen+{1},x
subroutine dteend
endm
mac drawtop
subroutine dt
ldy $1000,x
lda blkColors,y
bmi .1
bne .2
lda blkTL,y
sta colors+{1},x
sta screen+{1},x
lda blkTR,y
sta colors+{1}+1,x
bcc .3
.1: sta colors+{1},x
sta colors+{1}+1,x
.2: lda blkTL,y
sta screen+{1},x
lda blkTR,y
.3: sta screen+{1}+1,x
subroutine dtend
endm
mac drawedge
subroutine de
ldy $1000,x
lda blkColors,y
bmi .1
bne .2
lda (dsTopPtrLo),y
sta colors+{1},x
sta screen+{1},x
lda (dsBottomPtrLo),y
sta colors+{1}+40,x
bcc .3
.1: sta colors+{1},x
sta colors+{1}+40,x
.2: lda (dsTopPtrLo),y
sta screen+{1},x
lda (dsBottomPtrLo),y
.3: sta screen+{1}+40,x
subroutine deend
endm
mac drawfullblock
subroutine dfb
ldy $1000,x
lda blkColors,y
bmi .1
bne .2
lda blkTL,y
sta colors+{1},x
sta screen+{1},x
lda blkTR,y
sta colors+{1}+1,x
sta screen+{1}+1,x
lda blkBL,y
sta colors+{1}+40,x
sta screen+{1}+40,x
lda blkBR,y
sta colors+{1}+41,x
bcc .3
.1: sta colors+{1},x
sta colors+{1}+1,x
sta colors+{1}+40,x
sta colors+{1}+41,x
.2: lda blkTL,y
sta screen+{1},x
lda blkTR,y
sta screen+{1}+1,x
lda blkBL,y
sta screen+{1}+40,x
lda blkBR,y
.3: sta screen+{1}+41,x
subroutine dfbend
endm
mac drawfullblockexit
subroutine dfbe
ldy $1000,x
lda blkColors,y
bmi .1
bne .2
lda blkTL,y
sta colors+{1},x
sta screen+{1},x
lda blkTR,y
sta colors+{1}+1,x
sta screen+{1}+1,x
lda blkBL,y
sta colors+{1}+40,x
sta screen+{1}+40,x
lda blkBR,y
sta colors+{1}+41,x
sta screen+{1}+41,x
bcc {2}
.1: sta colors+{1},x
sta colors+{1}+1,x
sta colors+{1}+40,x
sta colors+{1}+41,x
.2: lda blkTL,y
sta screen+{1},x
lda blkTR,y
sta screen+{1}+1,x
lda blkBL,y
sta screen+{1}+40,x
lda blkBR,y
sta screen+{1}+41,x
bcc {2}
subroutine dfbeend
endm
mac loadrow
txa
adc mapTblLo+{3},y
sta {1}+1
sta {2}+1
lda zpSrcHi
adc mapTblHi+{3},y
sta {1}+2
sta {2}+2
endm
mac adjustedge
subroutine ae
inc {1}+1
bne .1
inc {1}+2
.1:
subroutine aeend
endm
mac copycrtcode
subroutine ccc
ldx #>({2}-{1}+$ff)
ldy #$00
lda #<{1}
sta zpSrcLo
lda #>{1}
sta zpSrcHi
lda #<{3}
sta zpDestLo
lda #>{3}
sta zpDestHi
.1: lda (zpSrcLo),y
sta (zpDestLo),y
iny
bne .1
inc zpSrcHi
inc zpDestHi
dex
bne .1
subroutine cccend
endm